He (the owner of Kobo) can do something about it. He can have his programmers update the firmware such that it is using the latest version of ADE that does not have the page number on the right side of the screen.

While he's getting his programmers to do that, can you also get him to get his programmers to fix the embedded font bug where it ignores the font-family CSS directive to use a specific embedded font if the font-family is placed in the body style. See the code box for an example.

Code:

body {
font-family: Charis;
widows: 0;
orphans: 0;
}

The font-family above is supposed to use the font labeled Charis (elsewhere in the CSS would be the font definition). But All Kobo Readers ignore this and it breaks a lot of embedded fonts in a lot of ePub as most publishers put the font-family for the main embedded font in the body style.

It ignores this because the style is malformed (red),
for consistency I always include the optional last semicolon (blue)